SU1332377A1 - Device for checking the digital magnetic recording apparatus - Google Patents

Abstract

The invention relates to the accumulation of information. The purpose of the invention is to increase the reliability of the control device. In the case of erroneous reproduction of K lines of recorded information, block 5 of the error impulse block generates a pulse of error, having a duration of K + 1 cycles. An error pulse arrives at the first input of the decoder 18, and at its second input - after a delay of 17 for one clock trigger. The decoder 18 generates an error pulse arriving at the element 11 and register 16. The error pulse is delayed in register 16 for a predetermined number of cycles and gates in the element 10 and the clock pulses from the bus 13 synchronization playback apparatus 3 magnet after their delay multivibrator, 14. Counter 9 counts the total number of errors displayed by the indicator 21. 1 Il. i (L with SAR ISD 00

Description

one

The invention relates to the accumulation of information, namely, devices for monitoring a digital magnetic recording apparatus.

The purpose of the invention is to increase the reliability of control of the digital magnetic recording apparatus.

The drawing shows a block diagram of the proposed device for controlling a digital magnetic recording apparatus.

The device contains the first counter 1 connected by the input to the bus 2 of the recording synchronization of the device 3 of the digital magnetic recording and connected to the 15 counter 8 and connected to the output

the output to the bus 4 input information by the second input of the first element And 10.

digital magnetic recording apparatus 3,

block 5 for error pulses,

connected by the first entrance to the bus 6

OUTPUT-NOY of the device information 3 digital-to-2-o magnetic recording.

second, third control of the digital magnet device; the input of the standby multivibrator 14 is connected to the synchronization bus of the playback of the device 3 digits

and the fourth counters 7-9, the first and second elements And 10 and 11, the trigger 1 and the playback clock 13 of the digital magnetic recorder apparatus 3.

The device also contains a standby multivibrator t4 connected by an output to the first inputs of the second counter 7 and the first element 10 and to the first input of the second element 11 connected to the first input of the third counter 8 and the first input of the trigger 12 which is connected to the second input the second counter, 7 and connected to the output of the second inputs of the second and third counters 7 and 8, the first and second registers 15 and 16 and an additional trigger 17 connected by the first inputs to the bus 13 synchronization of the device 3 digital magnetic recording, de the encoder 18, the adder 19, and the first and second indicators 20 and 21. The decoder 18 is connected to the output of an error pulse extraction unit 5. The adder 19 is provided with a control signal bus 22 connected to its first input. The first indicator 20 is connected to the output of the third counter 8. The second indicator 21 is connected to the output of the fourth counter 9, which is connected to its first

the input of the second bus 23 signal control information 55, caused by the occurrence of detentions and connected by a second input to the output of the first element And 10. The first register 15 is connected W, the left input to the bus 6 output information

3772

a digital magnetic recording apparatus 3 and is connected by an output to a second input of an adder 19 connected by an output to a second input of an error pulse extracting unit 5. The output of the error pulse extracting unit 5 is connected to the second input of an additional trigger 17 connected by an output to the second input of the de-diffractor 18. The output of the decoder 18 is connected to the second input of the And 11 element and to the second input of the second register 16, which is connected by the third input to the output Thirdly, the input of the standby multivibrator 14 is connected to the playback synchronization bus of the device 3 digit5

five

Noah records through the proposed. device is as follows.

The recording clock signals are received via the write synchronization bus 2 of the digital magnetic recording apparatus 3 to the input of the first counter 1, the width of which corresponds to the number of channels 0 of the digital magnetic recording apparatus 3. In this case, the input information signals are received via the input information bus 4 of the digital magnetic recording apparatus 3, recorded and reproduced therein. The result of the playback is fed through bus 6 of the output information of the device 3 of the digital magnetic recording to the inputs of the error impulse block 5 and the first register 15. The adder 19 increases the contents of the first register 15 in accordance with the code received from the first control signal bus 22 to the logical unit. Thanks to this on

5, the first and second inputs of the block 5. In the impulse of error pulses, the code of the reproduced line and the code of the previous line increased by the logical unit are received. When the information is correctly reproduced, the signals at the inputs of the block 5 in the impulse output of the error pulses are equal, and the error impulses at its output are absent. In case of erroneous reproduction of K lines recorded

0

0

individual bits and clock pulses of reproduction, block 5 of the pulse error pulses generates an error pulse, having;

Claims (1)

K + 1 cycles. This error pulse arrives at the first input of the decoder 18 directly, and Hd its second input - after a delay of an additional trigger 17 for one; clock cycle. The decoder 18 generates an error pulse having a duration of K cycles. The error pulse from the decoder 18 is supplied to the second element 11 and the second register 16, to which clock pulses are fed from the bus 13 to the synchronization of the playback of the digital magnetic recording apparatus 3. The error pulse from the decoder 18 delays in the second register 16 by a predetermined number of cycles and gates in the first element 10 of the clock pulses from the bus 13 synchronization playback of the device 3 digital magnetic recording after they are delayed by the waiting multivibrator 14. The first element 10 also acts on the fourth counter 9, which is previously set to the zero state by the control signal received via the second control signal bus 23. The fourth counter 9 counts the total number of errors displayed by the second indicator 21. The error pulse from the decoder 18 also gates in the second element 11 the clock pulses from the waiting multivibrator 14. The second element 11 forms a packet of k pulses, the first of which is set - pours trigger 12 into a single state, ensuring the supply of the enable potential to the second and third counters 7 and 8. The second counter 7 starts counting clock pulses from the waiting multivibrator 14, and the third counter 8 - pulse pulses OK from the second element AND 11. When the second counter 7 is filled, a pulse is formed that sets trigger 12 to the zero state, ensuring that the clock counts are stopped by the second counter 7. If the number of error pulses is greater than the specified number of cycles, the third counter 8 detects the potential that stops impulses of errors from the second register 16 to the first element And 10. At the same time, the first indicator 20 displays the exceeding of a predetermined number of clock cycles by the number of impulses of errors. A device for monitoring a digital magnetic recording apparatus containing Q 5 0 5 o 0 five The first counter, connected to the sync bus of the digital magnetic recorder and connected to the input information bus of the digital magnetic recorder, an error pulse pickup unit connected to the digital magnetic recorder by the first input, the second third and fourth counters, The first and second elements And, the trigger and the synchronization bus for reproducing the digital magnetic recording apparatus, characterized in that, in order to increase the reliability of the control, The main multivibrator connected by the output to the first inputs of the second counter and the first element And to the first input of the second element And connected by the output to the first input of the third counter and to the first input of the trigger, which is connected by the second input to the output of the second counter and connected by the output to the second inputs of the second and the third counter, the first and second registers and an additional trigger connected by the first inputs to the sync bus of the digital magnetic recording apparatus, the decoder connected by the input from the output the house of the error pulse extraction unit, the adder connected to the first control signal bus connected to its first input, the first indicator connected to the output of the third counter, the second indicator connected to the output of the fourth counter connected to the first input of the second bus control signal, and connected by the second input to the output of the first element I, the first register being connected by a second input to the output information bus of the digital magnetic recording apparatus and the output home to a second adder connected by an output to a second input of an error pulser; the output of which is connected to a second input of an additional trigger connected by an output to a second input of a decoder, the output of which is connected to a second input of a second element Nick a second input of a second register connected by a third input to the output of the third counter and the output connected to the second 51332377 the house of the first element, And, and the input to the synchronization awake of the reproducing multivibrator is connected to the digital magnetic recording apparatus.